Apr 21, 2020, 04:32 by local10@tutanota.com: > Netbeans 10 probably requires JDK 10 to run. > Actually, I just checked and Netbeans 10 should run fine on JDK 11. As per your original message you have two JDKs installed: JDK 11 and JDK 15. Make sure you are using JDK 11 to run Netbeans, if you still get the error while running Netbeans on JDK 11 then you may want to raise this issue on the Netbeans user list. Regards,